Description
The 2085‑OW16 is a 16‑point relay output expansion module manufactured by Allen‑Bradley (Rockwell Automation) for the Micro800™ controller family, specifically compatible with Micro850 and Micro870 programmable logic controllers. This digital output module provides 16 independent Form A (SPST‑NO) mechanical relay outputs, each rated at 2A, capable of switching both AC and DC loads over a wide voltage range.
Engineered for applications requiring flexible load control, the 2085‑OW16 allows mixing different voltage types on the same module—one point can control a 24V DC solenoid valve while another switches a 220V AC indicator lamp or small contactor. This versatility eliminates the need for separate DC and AC output modules, making the 2085‑OW16 a cost‑effective and space‑saving solution for discrete device control in small to mid‑sized automation systems.
Application Scenarios
Consider an OEM building a compact packaging machine with 12 pneumatic cylinders, 2 motor starters, and an alarm beacon—all requiring 24V DC or 120V AC control signals. The Micro850 controller’s built‑in outputs are insufficient, and panel space is tight. The 2085‑OW16 connects directly to the right side of the Micro850 via the expansion port, adding 16 relay outputs that can simultaneously drive the 24V DC solenoid valves and the 120V AC contactors. The module’s 2A per point rating handles the solenoid inrush current, while its C300/R150 pilot duty rating supports inductive loads like motor starters. This single‑module solution addresses the critical pain points of limited I/O capacity, mixed voltage requirements, and panel space constraints, cutting component count and installation time by up to 40% compared to using multiple dedicated output modules.
Parameters
| Main Parameters | Value/Description |
|---|---|
| Product Model | 2085‑OW16 |
| Manufacturer | Allen‑Bradley (Rockwell Automation) |
| Product Category | Digital Output Expansion Module |
| Number of Outputs | 16 points, Form A (SPST‑NO) mechanical relays |
| Output Voltage Range | 5‑250V AC / 5‑30V DC (per point, individually configurable) |
| Continuous Current per Point | 2A @ 240V AC / 2A @ 30V DC (resistive load) |
| Surge Current | 5A for 10 ms, repeatable every 1 s |
| Bus Current Draw | 5V DC: 120‑200 mA; 24V DC: 50‑130 mA (varies by source) |
| Power Dissipation | 2.72W‑5.14W (depending on load configuration) |
| Electrical Life | Approx. 100,000 operations at rated load |
| Mechanical Life | Approx. 10,000,000 operations (unloaded) |
| Isolation | Channel‑to‑system: 1500V AC; 240V continuous isolation rating |
| Dimensions (H x W x D) | 90 x 44.5 x 87 mm (3.54 x 1.75 x 3.43 in.) |
| Weight | Approx. 0.26 kg (0.56 lb) |
| Operating Temperature | -20°C to +65°C (-4°F to +149°F) |
| Mounting | DIN rail (35 mm) or panel mount |
| Wiring | Removable Terminal Block (RTB), 22‑14 AWG, 0.5‑0.6 Nm torque |
| Certifications | c‑UL‑us Class I Div 2, CE, RCM, KC |
| Compatible Controllers | Micro850, Micro870 (via expansion bus) |
| Status Indication | 16 yellow LEDs, one per output channel |
Technical Principles and Innovative Values
Innovation Point 1: Wide Voltage Range and AC/DC Mixing Capability
Unlike solid‑state output modules limited to a single voltage type, the 2085‑OW16 uses mechanical relays that can switch both AC and DC loads from 5V to 250V AC and 5V to 30V DC on a per‑point basis. This flexibility allows a single module to control diverse load types—solenoids, contactors, indicator lamps, and small motors—without requiring separate DC and AC output modules, significantly simplifying panel design and inventory management.
Innovation Point 2: Pilot Duty Rating (C300/R150) for Inductive Loads
The 2085‑OW16 carries a C300 and R150 pilot duty rating, indicating its capability to reliably switch inductive loads such as motor starters and relay coils. This certification is critical for applications where startup current surges can exceed steady‑state ratings, ensuring the module meets industry standards for industrial control performance.
Innovation Point 3: Removable Terminal Blocks (RTB) for Rapid Maintenance
The 2085‑OW16 is equipped with two removable 20‑pin terminal blocks that accept 22‑14 AWG wire. These RTBs can be removed while keeping field wiring intact, enabling rapid module replacement without rewiring—a feature that significantly reduces downtime during maintenance and troubleshooting.
